Band-saw



(No Model.)

`o. H. WESTON.

BAND SAW.

No. 578,050. Patented Mar. 2, 1897.

UNITED STATES PATENT OFFICE.

CLINTON HARRISON WESTON, OF LA CROSSE, WISCONSIN.

BAN D-SAW.

SPECIFICATION forming part of Letters Patent No. 578,050, dated March 2,1897.

Application led January 4, 1897. Serial No. 617,953. (No model.)

To all tlf/wm, it may concern:

Be it known that I, CLINTON HARRISON VESTON, a citizen of the UnitedStates, residing at La Crosse, in the county of La Crosse and State ofWisconsin, have invented certain new and useful Improvements in Band-Saws; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention has relation to certain improvement-s in band-saws; and theobject is to improve the construction and add to the durability of thesaw; and to these ends the novelty consists in the construction of thesaw, as will be hereinafter more fully described, and particularlypointed out in the claims.

In the accompanying drawings the same reference-characters indicate thesame parts of the invention.

Figure l is a perspective view of a bandsaw embodying my invention, andFig. 2 is an enlarged section of a portion of the bandsaw blade.

IIeretofore it has been necessary to roll or hammer the middle sectionof the saw longitudinally, so that when mounted the saw is driven byfrictional contact of its front and back on the pulleys; otherwise thelongitudinal central portion of the saw, being the same length as thefront and rear edges, would be subjected to the immense strain impartedby the convex face of thepulleys, which would cause it to part or break.lI overcome this objection and at the same time dispense with thetedious and expensive process of rolling or hammering.

A represents my improved band-saw.

B B are a series of transverse slots arranged parallel to each other andextending entirely through the saw-blade from side to side, withalternate slots arranged in the same longitudinal plane.

It will be observed that the slots are constructed of equal length andthat the end of each alternate slot is located nearer the cutting edgethan the other alternate slot.

The opposite ends of each slot B terminate in an enlarged circularrecess C, which reduces the tendency of the blade to crack at thesepoints, while the slots themselves permit the free expansion andsubsequent contraction longitudinally when the saw becomes heated inoperation.

A very important feature of my improvement is the fact that the oppositeends of the slots alternate to those whose ends are nearer the cuttingedge, are nearer the back of the saw, or about the same distance fromthe back as the intermediate slots are from the cutting edge, and as theback edge and the cutting edge are parallel there is a strip of solidmetal extending entirely around the back and cutting edges, whilebetween these strips or bands there is an intermediate strip, whichallows the blade to conformto the convex faces of the band-wheels overwhich the saw runs.

Having thus fully described my invention, what I claim as new anduseful, and desire to secure by Letters Patent of the United States, 1s-

l. As an improved article of manufacture, a band-saw blade provided witha series of transverse parallel slots, as and for the purpose set forth.

2. As an improved article of manufacture, a band-saw provided with aseries of parallel slots, arranged transversely to the length of theblade, as and for the purpose set forth.

3. As an improved article of manufacture, a band-saw provided with aseries of transverse parallel slots B B, arranged in alternatelongitudinal planes, as and for the purpose set forth.

4. As an improved article of manufacture an endless band-saw, providedwith a series of transverse parallel slots of equal length, the end ofeach alternate slot being located nearer the cutting edge than the sameend of the other alternate slot, substantially as and for the purposeset forth.

In testimony whereof I laffix my signature in presence of two witnesses.

CLINTON HARRISONl WESTON.

W'itnesses: i

FRANK WINTER, JOHN J. Escn.

